<?php
add_action( \'save_post\', \'post_updated\' );

function post_updated( $post_id ) {

    // verify post is not a revision & not an autosave
    if ( !wp_is_post_revision( $post_id ) && !(defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE) ) {
        // set the new post title
        $post[\'ID\'] = $post_id;
        $post[\'post_title\'] = get_post_meta($post_id, \'ecpt_name\', true);

        // update the post, removing the action to prevent an infinite loop
        remove_action( \'save_post\', \'post_updated\' );
        wp_update_post($post);
        add_action( \'save_post\', \'post_updated\' );
    }

}
?>

谢谢你的回复。必须澄清的是，我需要这样做只是为了影响某个CPT，而不是所有的职位。根据以下修改。然而，旧的帖子标题仍然显示在管理帖子列表中。必须找到解决方案。

// draw post title from name metabox on CPT student

add_action( \'save_post\', \'post_updated\' );

function post_updated( $post_id ) {

// affect only CPT student
if ($post_type == \'student\') {
    // set the new post title
    $post[\'ID\'] = $post_id;
    $post[\'post_title\'] = get_post_meta($post_id, \'ecpt_name\', true);

    // update the post, removing the action to prevent an infinite loop
    remove_action( \'save_post\', \'post_updated\' );
    wp_update_post($post);
    add_action( \'save_post\', \'post_updated\' );
}

}